@article {,
	title = {Role of magma mixing in the petrogenesis of tephra erupted during the 1990-98 explosive activity of Nevado Sabancaya, southern Peru},
	journal = {Bulletin of Volcanology},
	volume = {66},
	number = {6},
	year = {2004},
	pages = {541-561},
	url = {http://www.springerlink.com/openurl.asp?genre=article\&id=doi:10.1007/s00445-004-0340-3 },
	author = {Gerbe, Marie-Christine and Thouret, Jean-Claude}
}